Warp stop-motion for looms



A. E. RHOADES.

WARP STOP MOTION FOR LOOMS. APPLICATION FILED OCT. 151 i920.

' '1 ,38 5 ,7 1 1 Patented July 26, 1921.

3 SHEETS-SHEET I.

A. E. RHOADES.

WARP STOP MOTION FOR LOOMS. 4

APPLICATION FILED OCT. 15. 1920.

' Patented July 26, 1921.

3 SHEETS-SHEET 3.

1'' III II fll I III I I n fen 1 a 4& a GM UNITED- STATES, a

PATENT OFFICE;

ALoNzoE. RHOADES, 0F. HOPEDALQE, MASSACHUSETTS, Assielvon T0 'DRAPER. con; PORATION, or HOPEDALE, MASSACHUSETTS, A CORPORATION or MAINE.

' i WARP s'rordvro'rron roR LOOMS.

To (ZZZ whom it may concern Be it known that I, fXLO NZO E. RHDOADESL a citizen of the -United States, residing at Hopedale, in the county of W orc ester and State of Massachusetts, have invented ,an

Improvement in Warp Stop Motions for Looms, of which the following. descript on, in connection with the accompanying drawings, is a specification, like characterson the drawings representing like parts.

This invention relates to warp stop motions for looms, of that general'chara'cter wherein the warp detectors are supported by the warp threads, and when any one of the warp thr ads breaks or becomes too slack, the supported detectoreifects loom stoppage. Z

V arious forms of warp stop motions have heretofore been proposed, andfthey naturally divide themselvesinto two general types; first, that type wherein'the warp detectors drop into the path of a vibrating feeler and stop its vibration when a warp.

thread becomes broken or unduly slack, and second, that in which a dropped detector locks together two relatively movable toothed bars to effect loom stoppage, Since the warp detectors are supported bythe warp threads, they must be light and not:

injuriously affect the warp threads as they are drawn through the detectors durlng the weaving operation; In both types of warp stop'motions, however, the warp detectors are subjected to strains which tend to 1njure them. This is especially observable n the second type of warp stop motions, where in there is usually employed a fixed and a relatively longitudinally movable toothed bar, which are lockedtogether by a: dropped detector. in such type of warp stop motions, the longitudinally movable toothed bar is usually actuated by a vibrator or oscillating member having aspiring connection with the movable bar, the construction beingsuch that when the movable bar is arrested by a dropped detector, the vibrator continues its movement and places additional' stress upon the spring, which is transmitted through the movable bar to the dropped detector, with the result that the detector itself is liable to be injured or broken; i

Oneof the important'features of the'present invention, therefore, consists of a' warp stopmotion of the second type,' wherein a dropped warp detector isnot injuriously fSpecificati-on of Letters'Patent. j Patented J uly 26 1921. I npp'licationfiled October 15, 1920. sensin 417,1s

affected when it looks the relatively movable toothed bars from relative movement.

Another. importantf'eature of the present invention consists in, an actuator whichcarries a rocker connected to the movable toothed barand controlling the operative.

and inoperative position of a latch device which is renderedefi'ective to stop the loom V stop motion with parts broken away, and

showing more particularly the Warp; failure detecting means and associated parts; ig. 2 is a detail, partly in section, show ing the means for operating a stopping mechanism on call for loom stoppage;

Fig. '3 is a detached-detail, partly in section, showing guides for the latchcontrolling bars;

Fig. 4 is a detached view of one of, the latch-controlling bars; i I

Fig. 5 is a detached detail on an enlarged scale, showing more particularly the warp failure detecting means and the position of parts whilethe actuator is moving in one direction;

showing the position of parts when the actuator is moved in the opposite direction;

Fig. 7 is a side view showing the general relation between the warp failure detecting means and the loom change effecting means, or stopping mechanism; and Fig. 8 is an enlarged detail, showing the stopping dog and its associated parts, for effecting loom stoppage.

The loom frame may be of any usual construction, and as indicated in the drawings consists of the Side frames 1, between which the. warp failure detecting means is sup ported.

In the present instance of the invention, the side frames of the loom have extending therefrom the brackets '2 preferably provide'd with a slot 3, and on which rest thef arms or lugs 4 extending from the end portions'5 of the warp failure detecting mechanism. The arms 4 are preferably slotted 7 there may beffour of suchfixed bars, The

' at G and are secured to the brackets 2 by suitable means such asthebolts 7. The construction above described shown in Fig. 1, at one side of thejloom, and the other side is or may be substantially of the same character, the construction being such that the warp failure detecting means maybe detached from the loom frame with-- out disturbance of the parts between the. warp failure detecting means'an'd' the stop-' ping mechanism. I

' Secured to and extending between the end members 5 are the side members 8 over which the warp threads a extend. There,

are preferably two of the bar 8, one at the front and oneat the back of the warp failure detecting: means, and, if desired, additionallbars mayybe supported between the sets of relatively movable toothed bars,'as

will presently be described, inorder to, af-

ford a further support for th warp threads.

Secured to' each of the end members 5 of the.

warp failure detecting means. are the fixed toothed bars 9, of which there'may be one or more,'or as shown-in the present instance,

fixed bars 9 are secured to lugs. 10 upstand ing from the'end members 5, and in the present instance they are secured to said lugs by means of'the wing nuts 11, Fig. 1. Each of the fixed toothed bars .9 has associated with it a relatively movable toothed bar. In the present instance the fixed toothed bars 9 are provided with two rowsofteeth 12, Fig. 1, which may be formed on the up.

standing portions of the fixed bars 9 separatedby an appropriate groove for receiving therein the relatively movable toothed bar 13. The teethofjthe fixed and movable fixed barsmay'be variouslyoformed, but in the present instance the teeth onfthetwo, bars arepreferably disposed in an opposite direction, as indicated, though this. is not essential. The construction is such that the movabletoothed bars 13', may bereciprocated in'the groove of the fixed toothed bars, as

indicated in Fig. 1. l

Associated with eachofthe fixed and movable toothed bars 9 and 13 are the warp wa'rpthre'adsand adapted to drop to loclc I the fixed and movable toothed barsfrom,

is clearly.

' a side extending.

The detectors 14 are provided with,

relative longitudinal reciprocating move II1I1l3S.WlI6I1 a warp thread breaks or becomes t'oo slack. with the, warp failuredetecting means, and in the present instance of the invention consists of anarm 17"which may be conveniently mounted for rocking movement at, its lower endnpoh a. shaft 18 supported in suitable; bearings.19 extending from a bracket 20 secured to the loom frame; The shaft 18 is An actuator-is associated.

given a rocking movement 'tooperate the the, loom, the construction 'beingsuch. that upon rotation 'of the shaft 29, the vibrator and perforce, the actuator 17, will be given their operating movements,

The actuator 17 carries one or'more rockers fori1nparting ,.the longitudinal recipro eating movements" to. the movable toothed bars, and for furthertcontrolling the means for effecting loom stoppage. In the present instance of'the invention, the actuator 17' carries at its outer portion. a. stud 30 onwhich are mounted the tworockers 31. The upper portion of the rockers 31 are connect ed area to theimovable toothed bars 13. Extending downwardly from the rockers arethe arms 33;to which are pivotally connected at 34 the latch-controlling slides 35 which passthrough a guide 36 for directing their movementsunder thehction ofthe actuator, as moreclear-ly shown by Figs. 1 and3, v V

Eachv of the latch-controllingslides' 35 has I in 37 adapted to rest against the upwardly extending. arm 38 ,of a latch device which, in thepresent instance of the invention, con'sists of a hub portion 39 mounted for. rocking movement on the, actuator 17 andhavin ahooked end portion 40, the co nstruction; eing. suchrthat. when the [pins or studs 37- ;on the 'latch-.controlling slides 35ihold thev upper arms '38,of the latch device against-theguide 36,,theend portions 40 of thelatch devicewill beheld in an in-I. operative,position with respect to a ledge 41 mounted for. sliding movement on a support .42 extending from a'bracket43 secured to the loomframe, asbest indicated in Figs, 1, 5 and.6. Y i

The rocker 31, or in case. more than one rocker, is employed, eachrocker, has extending therefroma. weight carrying 44 on whichv is adjustably mounted a weight 45 which-,normallyacts. on the.rocker-to hold a cam. conveniently supported by a riser 26. I

the pins or studs 37 of the latch-controlling slides with the upwardly extendingarms 38. of he latch device against the guide 36, the

constructionbeing such that when the parts are in the position last described, and the actuator 17 is rocked about its pivotal support,the hooked end portions 4.0 of the latch device will 'escape'the ledge 41.

The ledge 41, herelnbei'ore mentioned, is

carried by an arm 46 pivotally connected at 47 to a leverS which is itself pivotallyv supported at 4:9 on the bracket 43 extending from the loom frame, 'Astop 5O on'the bracket 43 normally limits movement of the lever as in a contraclockwise direction, Figs. 1 and 5. c 4 V Extending through the upper slotted end 51 oiithe lever 48 is the pin 52, to which is secured a collar 53. The pin has mounted on it the casing 54, and between the collar and the end. 55 of the casing is interposed the spring 56, .the construction being such that'movement of the lever 48 in a clockwise direction, Fig. 2, will impart yielding longitudinal movement to thepin 52 through the spring 56.

Extending downwardly from the end member 5 of the warp failure detecting mechanism is a bracket 57, Fig. 22, carrying a tube 58 which maybe adjustably held in the bracket by a set screw 59, and the end" of the pin 52 has a head 60 which extends into the tube 58 and bears against the end of a wire 61 which is inclosed within a fiex.

iblecasin 62 which ma be convenientl z: 3

formed as an inclosing wire which, while permitting longitudinal movement 01": the

wire 61 within the casing 62, prevents buckling of the wire. The wire 61 is utilized as the means for transmitting stopping movement to the loom stopping mechanism, which may be substantially as shown and described in" the Burbank Patent, No. 1,240,666, dated September 18, 1917.

Mounted on the loom irame is a bracket 63, Fig. 7, through which extends the incased wire 61, the end of which bears against a setting plunger 64, Fig. 8. The plunger 6e controls the dog 65 which is normally held in inoperative position with respect to a hunter 66 carried by thelay, by means of a spring 67, substantially as it'ully described in the Burbank patent,' above mentioned. The dog 65 is pivotally' supported at 68 on a lever 69 pivotally mounted on the bracket 70. Pivotallysupported on theloom frame at 71 is the'knock-oii lever 72 which is connected by a link 78 to the "lever 69, as more fully described in theBurbank patent, to which reference has been made,the con struction being such that when the lever 48, hereinbefore described, is moved clockwise, Figs/1 and 2, an inthru'st is transmitted to the incased wire 61 which places the dog 65 in thepath of the bunter ,66 of'the lay 74 as it moves backwardly, to thereby knock-oil the shipper-lever and effect loom stoppage. llVhen thewarp threads at are intact and under normal tension, they hold the warp' detectors 14 in raised position as indicated in Fig. 1, and the movable toothed bars 13 are free to move longitudinally and relatively tothe fixed toothed bars 9 as the actuator 17 moves back and forth carrying with it the rocker or rockers. During such normal operation, the pins 87 hold the latch device with its hooked end portion 40 in in; operative position relative to the ledge 41, When, however, a warp thread breaks or becomes too slack for proper weaving conditions, the supported warp detector drops and locks the fixed and movable toothed bars from relative movement, so that as the actuator 47 moves to the right, as indicated in Fig. 5, the now stationary toothed bar 13 will tilt or rock the rocker into the position indicated, thereby removing the pin 87 from the arm 38 of the latch device, and permit the associated latch, to move into operative position with respect to the ledge 4:1, as indicated in Fig. 5. On the. return movement or the actuator-4:7, as indicated in Fig. 6, the latch device will move the lever 48 and eiiect endwise movement of the incased wire 61 to effect loom stoppage.

Zls hereinbelore noted, the warp detectors light metal devices, and the weights 45 are so constructed and arranged with} respect to the rocker to which the weight is associated, that when the movable toothed bar 13 is arrested by a dropped warp detector, and the actuator is moved to the right as indicated. in Fig. 5,, no increased strain or force 18 exerted against the droppel detectorv which might be calculated to injure it. In

other words, the effective force which pre-' vents rocking movement of the rocker and its undisturbed movement with the actu-' ator when its connected toothed bar is not obstructed, is not increased when the connected toothed bar is stopped by a dropped detector, as is usually the casewith stop motions of this type, wherein the force exerted upon the movable toothed'bar is effected by ment to the movable bar. The weights 43 may be and usually are just suflicient to hold the rocker from rocking movement, and maintain the latch device'in inoperative position during normal operation of the loom when the-threadsare in normalcondition,

I sothat when the: attached movable'toothed bar is obstructed by a, dropped detector, no

injurious strain is transmitted to the .de

movabletoothedbars; and in order to fa-" cilitate this without disorganizing the warp stop motion, the movable toothed bars '13 maybe connected to the rockerby a link 7 5 carrying'a pin 76 which engages an open slotin the end portion of themovable bar 13. In case there are a number of 'movable barre-fourfor instance, as indicatedin the drawings, the pin 76 may be conveniently extended to engage the slots in the two bars so that by throwing up the link 75, the warp failuredetecting means be disassociated with-the warp stop motion, without disturbance of'any of the parts of the latter.

What, is claimed is: V e r r 1. In a warp stop motion toriooms, the combinationoi a fixed and longitudinally movable toothed bar, series of'warp detectors which are hung upon and normally supported in raised position by the warp threads and constructed and varranged to lock the toothed bars together, anactuator, a rocker mounted on. the actuator for move ment therewith and for rocking movement thereon, connections between the rocker and movable toothed bar, means normally acting to hold-the rocker from rocking movement while being moved with the actuator and permitting such rocking movement when the toothedbar is held from" longitudinal movement by a warp detector dropped by a slack or broken warp thread, and meansrfor stop ping the loom. when therocker partakes of its rocking movement during .movement of the actuator. I 7

2. In avwarpv stop motion for looms, the combination of a fixed and a longitudinally movable toothed bar, a series of warp detectors which are hung upon and normally sup ported in raisedv position by the warp threads out of locking engagement with the fixed andmovable toothed bars, an actuator, a rocker bodily movable by the actuator,

connections between the rocker and the movable toothed bar, a weight which is connected to the rocker and normally holds it by the actuator and prevents rocking move- 7 ment thereof until the movable toothed bar is stopped by a warp detector dropped by a' slack or broken warp thread, and means rendered effective by rocking movement of the. rocker for stopping the loom.

In a warp 'stopmotion for looms, the combination ofa fixed and a longitudinally movable toothed bar, a seriesiof warp detectors which are hung upon and normally supported in. raised position by the warp ment by a. warp detector whichthreads;out ofiengagement with the toothed v movable with theyactuator, an'arm carried by the: rocker and normally acting under the 'inl-lu'ence of the weighttohold the latch in inoperative position, and imeansaactuated by the latch: for stopping the loom' when 'a warp dctector is dropped by a: warp thread into engagement with the teetlrof the fixed and movable toothed bar;

4- In a warp stop motion for looms, the,

combination: of toothed bars which are rela tively movablelongitudinally, a: series of warp detectors which, are hung upon andnormallyisupported in raised position by the warp threads, an actuatorhaving univform movement,. connections between the actuator and. one of the toothedbars fortransmitting -movement to the bar," a weightwhiclroperates through the connections to permit the connec'tedtoothed bar to bestopped by and withoutinjuryito a dropped detector, and

means for stopping the loom] when the toothed bars are locked from relative movehas been dropped by a warp thread.

5. In a warp stop motion for looms, the

combinationof toothed bars which are: rela tively movable. longitudinally, a series of warp detectors which are hung upon: and

normally supported in raised position by the warp threads, an actuator having vuniform movement, connections between the actuator and'one of the-toothed bars for trans mitting movement to-the bar, a weight which operates through the connections to vpermit J therconnected ,toothedbar to be stopped by andjwithout. injury toa dropped detector, a latch whichisheld in an inoperativeiposition; by the weight until the'toothed bars are locked fromrelative movement,and means actuated by thezlatch for stopping the loom warp detectors which, are normally held from rocking movement as it is bodily moved,

raised by intact warp threads, anwactuator for relatively moving the. toothed bars, a rocker connectedtotheactuator and having an arm connectedtoone ofl'the relatively movable toothed bars, a latch, a weight nor mally acting to holdthe latchiinan inopera-r combination of an actuator, a rocker connected to the actuator, an endwise movable toothed bar connected to the rocker for reciprocating movement thereby, a stop latch, means connected to the rocker and acting to hold the stop latch in inoperative position until the rocker is rocked by obstruction to reciprocating movement of the toothed bar, and a series of warp detectors normally supported in raised position by the warp threads and constructed and arranged to be dropped by a too slack or broken warp thread to lock the toothed bar from movement and cause the latch to efiiect loom stoppage.

8. In a warp stop motion for looms, the combination of toothed bars which are relatively movable longitudinally, a series of warp detectors normally supported in raised position by the warp threads for locking the toothed bars from relative movement when a warp thread breaks or becomes too slack, an actuator, connections between the actuator and one of the relatively movable toothed bars which transmits to the connected toothed bar the movement of the actuator, means operating through said connections with unvarying force to permit the toothed bar to be stopped by a warp detector without injurious effect on the detector when it is dropped by its warp thread, and means for stopping the loom when the toothed bars are locked from relative movement.

9. In a warp stop motion for looms, the combination of fixed and movable toothed bars, warp detectors which are hung upon and normally supported in raised position by the warp threads, an actuator, a rocker carried by the actuator and connected to the movable toothed bar, means normally acting to hold the rocker from rocking movement as it is bodily moved by the actuator and permitting such locking movement without injury to a warp detector when the warp detector is dropped by a warp thread breaking or becoming too slack, and means for stopping the loom when the rocker partakes of rocking movement.

10. In a warp stop motion for looms, the combination of fixed and movable toothed bars warp detectors, normally hung upon and held in raised position by the warp threads and constructed and arranged to lock the bars together when a warp thread breaks or becomes too slack, an actuator, a rocker carried by the actuator and connected to the movable toothed bar, means which normally acts to prevent rocking movement of the rocker on the actuator when the movable toothed bar is not obstructed from endwise movement and permitting such rocking movement without injury to the warp detector when the fixed and movable toothed bars are locked from relative movement by a dropped detector, a latch which isheld in inoperative position until the rocker partakes of its rocking movement and is then moved to operative position to stop the loom.

11. In a warp stop motion for looms, the combination of relatively fixed and longitudinally movable toothed bars, warp detectors normally supported in raised position and constructed and arranged to lock the bars together when the warp thread breaks or becomes too slack, an actuator for imparting longitudinal reciprocating movements to the movable toothed bars, rocker arms and latches carried bythe actuator, means connecting one end of the rocker arms to the movable toothed bars, means connected to the other ends of the rocker arms for normally holding the latches in inoperative position when movement of the movable toothed bars is not obstructed and permitting movement of the associated latch to operative position when one of the toothed bars is held from movement by a dropped warp detector, and means operated by an operatively positioned latch for stopping the loom.

12. In a warp stop motion for looms, the combination of fixed and movable toothed bars, warp detectors constructed and arranged to lock a fixed and movable toothed bar from relative movement when a warp thread breaks or becomes too slack, an actuator, a rocker arm mounted on and mov able with the actuator, a latch device mounted on the actuator, a rod connected to the rocker, an adjustable weight connected to the rocker and acting to hold it from rocking movement and the latch device in an inoperative position until the movable bar is obstructed in its freedom oil movement by a dropped detector, and means adapted to be operated by the operatively positioned latch for stopping the loom.

In testimony whereof, I have signed my name to this specification.

ALoNzo E. RHOADES. 

